Twll Maen Grisial
Fron Olau, Prenteg, Dolbenmaen, Gwynedd, Wales, UK
A mineralogical locale near Prenteg, probably best known for being the type locality of Brookite.
Showing all 2 results
-
Anatase from Twll Maen Grisial, Wales
Price range: £10.00 through £15.00 -
Rutile from Twll Maen Grisial, Wales
£10.00
Mindat lists 16 mineral species from the site, including one for which it is the type locality – Brookite.
Other titanium minerals are found here too – anatase, ilmenite, rutile, titanite.
The site is probably best known amongst micro collectors, as anatase and brookite specimens from the site can be really rather nice – if a little small.
The site now appears to be inaccessible, with the researchgate publication linked below suggesting this is to prevent rockfalls onto the A498.
Further reading
- https://www.mindat.org/loc-4279.html
- https://www.researchgate.net/publication/307932242_Rock_Crystal_Mining_in_Wales
- https://www.mineralienatlas.de/lexikon/index.php/UK/Wales/Gwynedd%2C%20County/Prenteg/Fron%20Olau/Twll%20Maen%20Grisial
We do have stock from various locales around Gwynedd, including:
Gwynedd, Wales- Benallt Mine, Rhiw, Aberdaron, Gwynedd, Wales
- Llechog Ridge, Snowdonia National Park, Gwynedd, Wales
- Manod Quarry, Ffestiniog, Gwynedd, Wales
- Tanygrisiau Railway Station, Tanygrisiau, Ffestiniog, Gwynedd, Wales
- Twll Maen Grisial, Fron Olau, Prenteg, Dolbenmaen, Gwynedd, Wales
If you’d like to view another county, use the following links: • Bridgend • Caerphilly • Cardiff • Ceredigion • Clwyd • Conwy • Gwynedd • Isle of Anglesey • Powys • Rhondda Cynon Taf • Vale of Glamorgan •
For the rest of our UK stock, see
United Kingdom
Fossils from the United Kingdom - Minerals from the United Kingdom